Oct 26, 2026 · Markus GasserHow to Test Back-Forward Cache, Page Visibility, and Stale DOM State Without Chasing Random Reload BugsA practical guide to test back-forward cache in browser automation, log page visibility events, and catch stale DOM state after history navigation without confusing restore behavior with a full reload.
Oct 21, 2026 · Markus GasserHow to Test Browser Storage Limits, Quota Errors, and Graceful Fallbacks Without Confusing App Bugs With Platform LimitsA practical guide to test browser storage quota errors in localStorage, sessionStorage, and IndexedDB, with reproducible automation steps and debugging clues.
Oct 16, 2026 · Markus GasserThe Fastest Path From AI Prompt to Editable TestsWhy the quickest useful AI testing workflow lands in editable steps, not generated framework code, and when Endtest is the clearest fit.
Oct 12, 2026 · Markus GasserHow to Test Custom Comboboxes, Typeahead Menus, and `aria-activedescendant` Keyboard Behavior Without Missing Focus BugsA practical checklist for testing custom comboboxes, typeahead menus, and aria-activedescendant keyboard behavior, with focus traps, arrow-key regressions, Escape handling, and accessibility edge cases.
Oct 7, 2026 · Markus GasserTesting Global Keyboard Shortcuts Without Hijacking the BrowserA practical guide to testing app-level keyboard shortcuts, hotkey conflicts, focus traps, and contenteditable edge cases while preserving browser and OS defaults.
Oct 2, 2026 · Markus GasserTesting `prefers-reduced-data` and slow-network fallbacks without turning the suite into a timing trapA practical guide to testing reduced-data preference, network throttling, and bandwidth-sensitive UI with stable assertions, short code examples, and fewer timing flakes.
Sep 28, 2026 · Markus GasserHow to Test Web Notification Permissions, Silent Fallbacks, and Permission Resets Without Chasing Browser NoiseA practical guide to testing Notification API permission states, fallback behavior, and resetting permissions between browser automation runs without flaky results.
Sep 23, 2026 · Markus GasserHow to Test the File System Access API Without Mistaking Browser Permissions for App BugsA practical guide to testing showOpenFilePicker, showSaveFilePicker, and directory access, with permission setup, automation limits, and checks that separate browser behavior from app bugs.
Sep 18, 2026 · Markus GasserHow to Test ``, Focus Traps, and Escape-Key Behavior Without Missing Modal Regressions</a></h3>A practical guide to browser dialog testing, focus trap testing, escape key modal close behavior, and inert background checks for native `` and custom overlays.</p></div></article> Sep 13, 2026 · Markus GasserLazy-Loaded Content Tests That Don't Get Stuck on PlaceholdersA practical guide to testing lazy-loaded content, placeholder swaps, and viewport-triggered renders with browser automation, including what to assert before scroll, after scroll, and after network idle. Sep 7, 2026 · Markus GasserHow to Debug Browser Tests That Fail Only After CSS Container Queries or Resize-Driven Layout ShiftsA practical guide to debugging browser tests that fail only after CSS container queries, viewport changes, sidebar collapses, or delayed reflow. Sep 3, 2026 · Markus GasserHow to Debug Browser Tests That Fail When a Service Worker Updates the App Mid-SessionA practical debugging guide for browser automation flakiness caused by service worker updates, cache refreshes, and app version mismatch during tests. Aug 29, 2026 · Markus GasserHow to Test Timezone, Locale, and Number Formatting Bugs in Browser Automation Without Chasing Environment DriftA practical guide to test timezone and locale bugs in browser automation with reproducible setup, stable assertions, and failure-mode debugging for dates, currencies, and numbers. Aug 25, 2026 · Markus GasserHow to Debug Browser Tests That Fail Only When Content Security Policy Blocks a Script, Frame, or Inline HandlerA practical guide to debugging browser test failures caused by Content Security Policy, including console signals, blocked script and frame patterns, inline handler issues, and a workflow to separate app bugs from policy misconfigurations. Aug 19, 2026 · Markus GasserHow to Test Accessibility Fixes Without Turning Every Audit into a False Alarm HuntA practical QA guide to validating accessibility fixes with manual checks, automated axe scans, keyboard navigation, contrast checks, and screen reader smoke tests. Aug 7, 2026 · Markus GasserHow to Test Multi-Window and Cross-Tab User Journeys Without Losing Session StateA practical guide to test multi-window workflows, handle pop-up flows, and stabilize browser automation when session state moves across tabs and windows. Jul 31, 2026 · Markus GasserWhy Playwright Suites Become Expensive to Maintain When Claude Generates Most of the CodeAn investigative look at why Playwright suites generated by Claude can create hidden ownership cost, review burden, and test architecture drift, plus when lower-maintenance alternatives make sense. Jul 30, 2026 · Markus GasserHow to Test LLM Structured Outputs Without Writing Fragile Assertions for Every Edge CaseA practical guide to test LLM structured outputs with schema checks, tolerant assertions, golden files, and failure-mode analysis without assuming the model is deterministic. Jul 29, 2026 · Markus GasserHow to Test React Server Actions and Optimistic UI Without Chasing the Wrong FailuresA practical guide to testing React Server Actions and optimistic UI by separating true defects from expected intermediate states, with concrete assertions for success, rollback, and partial failure paths. Jul 28, 2026 · Markus GasserHow to Build Reliable Browser Tests for Upload, Download, and File-Validation Flows Without Brittle SetupA practical tutorial for browser tests for upload and download flows, covering file validation, blob URLs, download assertions, CI artifacts, and the hidden failure modes that cause flaky tests. Jul 27, 2026 · Markus GasserHow to Debug Browser Tests That Pass Locally but Fail in CI After Asset Hash ChangesLearn how to debug browser tests that pass locally but fail in CI after asset hash changes, using logs, traces, cache checks, and environment comparisons. Jul 27, 2026 · Markus GasserTesting Multi-Step Checkout Flows Without Letting Discounts, Shipping Rules, and Recovery Paths DriftA practical tutorial for test multi-step checkout flows, with focus on discount code validation, shipping rule testing, back-button behavior, and recovery path testing across fragile checkout states. Jul 24, 2026 · Markus GasserHow to Debug Frontend Tests That Fail After Feature Flag ChangesA practical debugging guide for frontend tests that fail after feature flag changes, with steps to separate flag logic, selectors, data, runtime config drift, and environment issues. Jul 21, 2026 · Markus GasserHow to Test Cross-Origin iframe Messaging in Browser AutomationA practical guide to testing cross-origin iframe messaging with postMessage, origin checks, sandbox behavior, and browser automation examples in Playwright and Selenium. Jul 21, 2026 · Markus GasserHow to Test Skeleton Screens, Loading Shimmers, and Progressive Rendering Without Chasing False PositivesA practical tutorial for QA engineers and SDETs on how to test skeleton screens, loading shimmer states, and progressive rendering without brittle waits or false positives. Jul 20, 2026 · Markus GasserHow to Test Responsive Tables Without Missing Horizontal Scroll Bugs, Column Collapse, and Sticky Header ReflowsA practical tutorial on how to test responsive tables, covering horizontal scroll QA, column collapse behavior, sticky header reflows, breakpoints, and repeatable browser checks. Jul 20, 2026 · Markus GasserWhat QA Teams Should Log When a Browser Test Fails Only After a Third-Party Script LoadsA practical debugging playbook for QA teams when browser tests fail only after analytics tags, chat widgets, consent tools, or embedded scripts load. Learn what to log, how to isolate the fault, and how to separate app bugs from third-party breakage. Jul 19, 2026 · Markus GasserTesting the Last Mile of Downloads: Endtest for Blob URLs, PDF Exports, and Report ValidationA practical review of Endtest for file download testing, including blob URL validation, PDF exports, report downloads, file integrity checks, and tradeoffs versus code-heavy browser frameworks. Jul 17, 2026 · Markus GasserWhat Happens When Claude Generates a Huge Playwright Framework for You? The Maintenance Cost Nobody Budgets ForA practical analysis of the Claude generated Playwright framework maintenance cost, including review burden, architecture drift, token usage, flaky tests, CI overhead, and long-term ownership tradeoffs. Jul 16, 2026 · Markus GasserHow to Test React Hydration Mismatches Without Chasing False Alarms in SSR and Streaming UIA practical guide to testing React hydration mismatches in SSR and streaming UI, separating real defects from harmless re-renders, timing noise, and client-server render drift. Jul 16, 2026 · Markus GasserHow to Test Infinite Scroll Without Missing Duplicate Loads, Jumping Scroll Positions, and Lost ItemsA practical tutorial on how to test infinite scroll in feeds, search results, and dashboards, covering duplicate API loads, scroll position bugs, lazy loading QA, and item loss. Jul 15, 2026 · Markus GasserHow to Test Browser Autofill, Saved Passwords, and Pre-Populated Form State Without Creating Flaky QA RunsLearn how to test browser autofill in QA, saved passwords testing, and pre-populated form state without flaky browser-dependent failures in Playwright, Selenium, and CI. Jul 14, 2026 · Markus GasserWhy Canary Deploys Still Need Human QA Signals Before You Trust the RolloutLearn why canary deploy QA signals, release confidence, rollout validation, and production checks still need human observation, not just green metrics and traffic percentages. Jul 13, 2026 · Markus GasserHow to Build a CI Gate for Preview Deployments That Catches Real Frontend Breakage Without Slowing MergesLearn how to design a CI gate for preview deployments that catches meaningful frontend regressions, improves merge confidence, and avoids turning release gating into a bottleneck. Jul 11, 2026 · Markus GasserHow to Build a QA Signal for AI-Assisted PRs Without Trusting Green Checks AloneLearn how to build a practical QA signal for AI-assisted pull requests using CI signals, review heuristics, risk scoring, and targeted tests to improve release confidence. Jul 9, 2026 · Markus GasserHow to Build a CI Check for AI-Assisted Frontend Changes Before They MergeLearn how to build a CI check for AI-assisted frontend changes with static checks, visual tests, smoke tests, and merge-risk controls that reduce UI regressions without adding manual QA overhead. Jul 9, 2026 · Markus GasserHow to Test Browser Back Button Behavior Without Missing State Loss and Duplicate SubmissionsLearn how to test browser back button behavior for state restoration, duplicate form submission, cached pages, and navigation edge cases with practical QA and automation examples. Jul 7, 2026 · Markus GasserHow to Test Drag-and-Drop Reordering Without Fighting Pointer Events, Ghost Elements, and Scroll JankA practical tutorial for testing drag-and-drop reordering in real apps, covering pointer events testing, ghost element bugs, auto-scroll, locator stability, and E2E flakiness. Jul 7, 2026 · Markus GasserWhy Visual Regression Misses Real Bugs in Component Libraries With Portals, Hover Cards, and Dynamic SlotsLearn why visual regression misses bugs in component libraries with portals, hover cards, and dynamic slots, and what QA should test instead. Jul 6, 2026 · Markus GasserHow to Test AI Features That Return Non-Deterministic Outputs Without Writing Brittle AssertionsA practical workflow for test non-deterministic AI outputs by validating structure, behavior, guardrails, and tolerance thresholds instead of exact text matches. Jul 5, 2026 · Markus GasserHow to Debug Flaky Browser Tests Caused by Toasts, Animations, and Auto-Dismissing UILearn how to diagnose flaky browser tests caused by toasts, animations, and auto-dismissing UI, with practical debugging steps, locator strategies, and wait patterns. Jun 30, 2026 · Markus GasserHow to Debug Browser Tests That Break After CDN, Cache-Control, or Asset Hash ChangesLearn how to debug browser tests that fail after CDN invalidation, cache-control header changes, or asset hash updates, with practical checks for stale static assets and browser automation failures. Jun 29, 2026 · Markus GasserHow to Test WebSockets, Live Updates, and Real-Time Dashboards Without Chasing Ghost BugsA practical guide to test WebSockets in browser automation, verify live update UI testing, and reduce websocket UI regression in dashboards and collaborative apps. Jun 20, 2026 · Markus GasserHow to Build a QA Smoke Checklist for Preview Deployments Before a Release Candidate Goes LiveBuild a practical QA smoke checklist for preview deployments that catches bad builds early without turning every release candidate into a full regression cycle. Jun 18, 2026 · Markus GasserHow to Debug Browser Test Failures Caused by Cache, Local Storage, and IndexedDB PollutionLearn how to diagnose browser test failures caused by stale cache, local storage, and IndexedDB state, with practical debugging steps and cleanup strategies. Jun 16, 2026 · Markus GasserHow to Test AI Features That Call External APIs, Tools, or Agents Without Relying on Prompt-Only ChecksLearn how to test AI features that call external APIs, tools, or agents by validating tool invocation, state handling, retries, and recovery, not just prompt output. Jun 16, 2026 · Markus GasserWhy Browser Tests Pass in Local Dev but Fail in CI: The Hidden Environment Drift ChecklistA practical checklist for environment drift causes behind browser tests that pass locally but fail in CI, including fonts, timezone, viewport, caching, and browser versions. Jun 15, 2026 · Markus GasserHow to Test Multi-Window and Cross-Tab User Journeys Without Losing Session StateA practical guide to testing multi-window workflows, cross-tab testing, pop-up flows, and browser automation without flaky session-state failures. Jun 15, 2026 · Markus GasserHow to Test Theme Switching, Dark Mode, and User Preference Persistence Without Missing Visual RegressionsLearn how to test dark mode and theme switching, verify saved preferences, and catch visual regressions with practical QA strategies and automation examples. Jun 14, 2026 · Markus GasserWhy Green CI Can Still Hide Broken Releases: The Signals QA Teams Should WatchA practical analysis of why passing CI can still produce broken releases, and which release quality signals QA, DevOps, and engineering leaders should watch before production users feel the pain. Jun 13, 2026 · Markus GasserHow to Test Browser Notification Permission Flows Without Shipping Silent UX BreakageA practical guide to test browser notification permissions across Chrome, Firefox, Safari, and Edge, covering allow, deny, blocked states, automation patterns, and edge cases. Jun 12, 2026 · Markus GasserHow to Test Cookie Consent Banners Without Breaking Analytics, Tracking, or AccessibilityA practical guide to test cookie consent banners across UX, analytics tracking verification, consent mode testing, and accessibility, with browser checks, automation ideas, and edge cases. Jun 11, 2026 · Markus GasserHow to Test AI Coding Assistant Changes Before They Quietly Break Your FrontendA practical workflow for testing AI coding assistant changes, catching AI-generated UI changes, preventing frontend regression testing gaps, and spotting markup drift before merge. Jun 10, 2026 · Markus GasserHow to Cut Flaky Test Triage Time Before It Slows Down ReleasesLearn how to reduce flaky test triage time, lower CI failure triage overhead, and keep releases moving with practical maintenance, debugging, and governance tactics. Jun 10, 2026 · Markus GasserWhy Browser Tests Fail in Preview Deployments Even When Staging Looks FineA debugging guide to browser tests failing in preview deployments, covering ephemeral deployment testing, environment drift, flaky selectors, auth issues, and practical fixes. Jun 9, 2026 · Markus GasserHow to Test Web App Print Styles Before Customers Discover Broken Invoices and ReportsA practical guide to test print styles in web apps, catch print CSS testing issues, and prevent browser print preview bugs in invoices, reports, and admin pages. Jun 8, 2026 · Markus GasserHow to Test Keyboard Navigation in Complex Web Apps Without Missing Real Accessibility BugsA practical guide to test keyboard navigation in web apps, with focus order testing, keyboard accessibility pitfalls, modal traps, menu behavior, and accessibility regression checks. Jun 4, 2026 · Markus GasserHow to Reduce CI Noise When Flaky Tests Hide Real Release RisksLearn how to reduce CI noise from flaky tests, improve flaky test triage, and keep pipeline signal strong enough to protect release confidence. Jun 3, 2026 · Markus GasserWhy GitHub Actions Browser Tests Fail Only on Pull Requests, Not Main BranchDebug why browser tests fail on pull requests in GitHub Actions but pass on main, including cache differences, permissions, env vars, parallelism, and CI drift. Jun 3, 2026 · Markus GasserHow to Test AI-Generated UI Changes Before They Break Your Frontend Regression SuiteA practical workflow for QA engineers and frontend teams to test AI-generated UI changes, catch regressions early, and keep frontend regression testing stable. Jun 2, 2026 · Markus GasserWhat Is Exploratory Testing?Learn what exploratory testing is, how it differs from scripted testing, how test charters and session-based testing work, and how teams document findings without making QA rigid. Jun 2, 2026 · Markus GasserPlaywright Test Data Cleanup Patterns That Keep CI Runs RepeatableLearn practical Playwright test data cleanup patterns for seeded test data, isolation, and teardown so CI runs stay repeatable and browser tests stop failing from leftover state. Jun 1, 2026 · Markus GasserWhy Frontend Teams Keep Missing Accessibility Regressions in ReviewA practical opinion piece on why frontend accessibility regressions slip through code review, and the testing habits that catch them earlier with semantic HTML, keyboard navigation, and visual review. Jun 1, 2026 · Markus GasserHow to Add Quality Gates to CI/CD Without Slowing Down ReleasesLearn how to design quality gates in CI/CD with smoke tests, targeted regression, and lightweight approvals so releases stay fast without losing confidence. May 29, 2026 · Markus GasserHow to Test Feature Flags in Production Without Accidentally Testing the Wrong AudienceA practical guide to test feature flags in production safely, with workflows for audience targeting QA, rollout testing, kill switches, and timing pitfalls. May 28, 2026 · Markus GasserHow to Debug Hydration Mismatch Bugs Before They Turn Into False Frontend FailuresA practical guide to debug hydration mismatch bugs, separate real frontend defects from test noise, and use logs, screenshots, and rendering clues to find the root cause. May 26, 2026 · Markus GasserPlaywright Flaky Test Debugging Checklist: 15 Things to Check Before You Blame the AppA practical Playwright flaky test debugging checklist for selectors, waits, locators, network mocking, CI variance, and test data isolation before you blame the app. May 25, 2026 · Markus GasserHow to Test Feature Flags Without Turning Every Release Into a Guessing GameA practical feature flag testing workflow for validating enabled, disabled, and partial-rollout states with QA, SDET, and release team-friendly tactics. May 23, 2026 · Markus GasserHow to Keep Test Automation Maintainable When Your Product Changes Every SprintA practical analysis of test automation maintainability sprint changes, stable locators, test refactoring, and how to keep your regression suite healthy without rewriting everything. May 20, 2026 · Markus GasserHow Much Test Automation Is EnoughLearn how to decide what to automate, what to keep manual, and how to balance test automation coverage, regression risk, and maintenance cost. May 19, 2026 · Markus GasserHow to Avoid Brittle Automated TestsLearn how to avoid brittle automated tests with better locators, waits, test data, isolation, and maintenance habits that reduce flaky tests and CI noise. May 18, 2026 · Markus GasserHow to Reduce Test Maintenance CostsA practical guide for QA managers, SDETs, and CTOs on reducing test maintenance costs, lowering QA automation cost, and building less flaky test suites. </section>
Sep 13, 2026 · Markus GasserLazy-Loaded Content Tests That Don't Get Stuck on PlaceholdersA practical guide to testing lazy-loaded content, placeholder swaps, and viewport-triggered renders with browser automation, including what to assert before scroll, after scroll, and after network idle.
Sep 7, 2026 · Markus GasserHow to Debug Browser Tests That Fail Only After CSS Container Queries or Resize-Driven Layout ShiftsA practical guide to debugging browser tests that fail only after CSS container queries, viewport changes, sidebar collapses, or delayed reflow.
Sep 3, 2026 · Markus GasserHow to Debug Browser Tests That Fail When a Service Worker Updates the App Mid-SessionA practical debugging guide for browser automation flakiness caused by service worker updates, cache refreshes, and app version mismatch during tests.
Aug 29, 2026 · Markus GasserHow to Test Timezone, Locale, and Number Formatting Bugs in Browser Automation Without Chasing Environment DriftA practical guide to test timezone and locale bugs in browser automation with reproducible setup, stable assertions, and failure-mode debugging for dates, currencies, and numbers.
Aug 25, 2026 · Markus GasserHow to Debug Browser Tests That Fail Only When Content Security Policy Blocks a Script, Frame, or Inline HandlerA practical guide to debugging browser test failures caused by Content Security Policy, including console signals, blocked script and frame patterns, inline handler issues, and a workflow to separate app bugs from policy misconfigurations.
Aug 19, 2026 · Markus GasserHow to Test Accessibility Fixes Without Turning Every Audit into a False Alarm HuntA practical QA guide to validating accessibility fixes with manual checks, automated axe scans, keyboard navigation, contrast checks, and screen reader smoke tests.
Aug 7, 2026 · Markus GasserHow to Test Multi-Window and Cross-Tab User Journeys Without Losing Session StateA practical guide to test multi-window workflows, handle pop-up flows, and stabilize browser automation when session state moves across tabs and windows.
Jul 31, 2026 · Markus GasserWhy Playwright Suites Become Expensive to Maintain When Claude Generates Most of the CodeAn investigative look at why Playwright suites generated by Claude can create hidden ownership cost, review burden, and test architecture drift, plus when lower-maintenance alternatives make sense.
Jul 30, 2026 · Markus GasserHow to Test LLM Structured Outputs Without Writing Fragile Assertions for Every Edge CaseA practical guide to test LLM structured outputs with schema checks, tolerant assertions, golden files, and failure-mode analysis without assuming the model is deterministic.
Jul 29, 2026 · Markus GasserHow to Test React Server Actions and Optimistic UI Without Chasing the Wrong FailuresA practical guide to testing React Server Actions and optimistic UI by separating true defects from expected intermediate states, with concrete assertions for success, rollback, and partial failure paths.
Jul 28, 2026 · Markus GasserHow to Build Reliable Browser Tests for Upload, Download, and File-Validation Flows Without Brittle SetupA practical tutorial for browser tests for upload and download flows, covering file validation, blob URLs, download assertions, CI artifacts, and the hidden failure modes that cause flaky tests.
Jul 27, 2026 · Markus GasserHow to Debug Browser Tests That Pass Locally but Fail in CI After Asset Hash ChangesLearn how to debug browser tests that pass locally but fail in CI after asset hash changes, using logs, traces, cache checks, and environment comparisons.
Jul 27, 2026 · Markus GasserTesting Multi-Step Checkout Flows Without Letting Discounts, Shipping Rules, and Recovery Paths DriftA practical tutorial for test multi-step checkout flows, with focus on discount code validation, shipping rule testing, back-button behavior, and recovery path testing across fragile checkout states.
Jul 24, 2026 · Markus GasserHow to Debug Frontend Tests That Fail After Feature Flag ChangesA practical debugging guide for frontend tests that fail after feature flag changes, with steps to separate flag logic, selectors, data, runtime config drift, and environment issues.
Jul 21, 2026 · Markus GasserHow to Test Cross-Origin iframe Messaging in Browser AutomationA practical guide to testing cross-origin iframe messaging with postMessage, origin checks, sandbox behavior, and browser automation examples in Playwright and Selenium.
Jul 21, 2026 · Markus GasserHow to Test Skeleton Screens, Loading Shimmers, and Progressive Rendering Without Chasing False PositivesA practical tutorial for QA engineers and SDETs on how to test skeleton screens, loading shimmer states, and progressive rendering without brittle waits or false positives.
Jul 20, 2026 · Markus GasserHow to Test Responsive Tables Without Missing Horizontal Scroll Bugs, Column Collapse, and Sticky Header ReflowsA practical tutorial on how to test responsive tables, covering horizontal scroll QA, column collapse behavior, sticky header reflows, breakpoints, and repeatable browser checks.
Jul 20, 2026 · Markus GasserWhat QA Teams Should Log When a Browser Test Fails Only After a Third-Party Script LoadsA practical debugging playbook for QA teams when browser tests fail only after analytics tags, chat widgets, consent tools, or embedded scripts load. Learn what to log, how to isolate the fault, and how to separate app bugs from third-party breakage.
Jul 19, 2026 · Markus GasserTesting the Last Mile of Downloads: Endtest for Blob URLs, PDF Exports, and Report ValidationA practical review of Endtest for file download testing, including blob URL validation, PDF exports, report downloads, file integrity checks, and tradeoffs versus code-heavy browser frameworks.
Jul 17, 2026 · Markus GasserWhat Happens When Claude Generates a Huge Playwright Framework for You? The Maintenance Cost Nobody Budgets ForA practical analysis of the Claude generated Playwright framework maintenance cost, including review burden, architecture drift, token usage, flaky tests, CI overhead, and long-term ownership tradeoffs.
Jul 16, 2026 · Markus GasserHow to Test React Hydration Mismatches Without Chasing False Alarms in SSR and Streaming UIA practical guide to testing React hydration mismatches in SSR and streaming UI, separating real defects from harmless re-renders, timing noise, and client-server render drift.
Jul 16, 2026 · Markus GasserHow to Test Infinite Scroll Without Missing Duplicate Loads, Jumping Scroll Positions, and Lost ItemsA practical tutorial on how to test infinite scroll in feeds, search results, and dashboards, covering duplicate API loads, scroll position bugs, lazy loading QA, and item loss.
Jul 15, 2026 · Markus GasserHow to Test Browser Autofill, Saved Passwords, and Pre-Populated Form State Without Creating Flaky QA RunsLearn how to test browser autofill in QA, saved passwords testing, and pre-populated form state without flaky browser-dependent failures in Playwright, Selenium, and CI.
Jul 14, 2026 · Markus GasserWhy Canary Deploys Still Need Human QA Signals Before You Trust the RolloutLearn why canary deploy QA signals, release confidence, rollout validation, and production checks still need human observation, not just green metrics and traffic percentages.
Jul 13, 2026 · Markus GasserHow to Build a CI Gate for Preview Deployments That Catches Real Frontend Breakage Without Slowing MergesLearn how to design a CI gate for preview deployments that catches meaningful frontend regressions, improves merge confidence, and avoids turning release gating into a bottleneck.
Jul 11, 2026 · Markus GasserHow to Build a QA Signal for AI-Assisted PRs Without Trusting Green Checks AloneLearn how to build a practical QA signal for AI-assisted pull requests using CI signals, review heuristics, risk scoring, and targeted tests to improve release confidence.
Jul 9, 2026 · Markus GasserHow to Build a CI Check for AI-Assisted Frontend Changes Before They MergeLearn how to build a CI check for AI-assisted frontend changes with static checks, visual tests, smoke tests, and merge-risk controls that reduce UI regressions without adding manual QA overhead.
Jul 9, 2026 · Markus GasserHow to Test Browser Back Button Behavior Without Missing State Loss and Duplicate SubmissionsLearn how to test browser back button behavior for state restoration, duplicate form submission, cached pages, and navigation edge cases with practical QA and automation examples.
Jul 7, 2026 · Markus GasserHow to Test Drag-and-Drop Reordering Without Fighting Pointer Events, Ghost Elements, and Scroll JankA practical tutorial for testing drag-and-drop reordering in real apps, covering pointer events testing, ghost element bugs, auto-scroll, locator stability, and E2E flakiness.
Jul 7, 2026 · Markus GasserWhy Visual Regression Misses Real Bugs in Component Libraries With Portals, Hover Cards, and Dynamic SlotsLearn why visual regression misses bugs in component libraries with portals, hover cards, and dynamic slots, and what QA should test instead.
Jul 6, 2026 · Markus GasserHow to Test AI Features That Return Non-Deterministic Outputs Without Writing Brittle AssertionsA practical workflow for test non-deterministic AI outputs by validating structure, behavior, guardrails, and tolerance thresholds instead of exact text matches.
Jul 5, 2026 · Markus GasserHow to Debug Flaky Browser Tests Caused by Toasts, Animations, and Auto-Dismissing UILearn how to diagnose flaky browser tests caused by toasts, animations, and auto-dismissing UI, with practical debugging steps, locator strategies, and wait patterns.
Jun 30, 2026 · Markus GasserHow to Debug Browser Tests That Break After CDN, Cache-Control, or Asset Hash ChangesLearn how to debug browser tests that fail after CDN invalidation, cache-control header changes, or asset hash updates, with practical checks for stale static assets and browser automation failures.
Jun 29, 2026 · Markus GasserHow to Test WebSockets, Live Updates, and Real-Time Dashboards Without Chasing Ghost BugsA practical guide to test WebSockets in browser automation, verify live update UI testing, and reduce websocket UI regression in dashboards and collaborative apps.
Jun 20, 2026 · Markus GasserHow to Build a QA Smoke Checklist for Preview Deployments Before a Release Candidate Goes LiveBuild a practical QA smoke checklist for preview deployments that catches bad builds early without turning every release candidate into a full regression cycle.
Jun 18, 2026 · Markus GasserHow to Debug Browser Test Failures Caused by Cache, Local Storage, and IndexedDB PollutionLearn how to diagnose browser test failures caused by stale cache, local storage, and IndexedDB state, with practical debugging steps and cleanup strategies.
Jun 16, 2026 · Markus GasserHow to Test AI Features That Call External APIs, Tools, or Agents Without Relying on Prompt-Only ChecksLearn how to test AI features that call external APIs, tools, or agents by validating tool invocation, state handling, retries, and recovery, not just prompt output.
Jun 16, 2026 · Markus GasserWhy Browser Tests Pass in Local Dev but Fail in CI: The Hidden Environment Drift ChecklistA practical checklist for environment drift causes behind browser tests that pass locally but fail in CI, including fonts, timezone, viewport, caching, and browser versions.
Jun 15, 2026 · Markus GasserHow to Test Multi-Window and Cross-Tab User Journeys Without Losing Session StateA practical guide to testing multi-window workflows, cross-tab testing, pop-up flows, and browser automation without flaky session-state failures.
Jun 15, 2026 · Markus GasserHow to Test Theme Switching, Dark Mode, and User Preference Persistence Without Missing Visual RegressionsLearn how to test dark mode and theme switching, verify saved preferences, and catch visual regressions with practical QA strategies and automation examples.
Jun 14, 2026 · Markus GasserWhy Green CI Can Still Hide Broken Releases: The Signals QA Teams Should WatchA practical analysis of why passing CI can still produce broken releases, and which release quality signals QA, DevOps, and engineering leaders should watch before production users feel the pain.
Jun 13, 2026 · Markus GasserHow to Test Browser Notification Permission Flows Without Shipping Silent UX BreakageA practical guide to test browser notification permissions across Chrome, Firefox, Safari, and Edge, covering allow, deny, blocked states, automation patterns, and edge cases.
Jun 12, 2026 · Markus GasserHow to Test Cookie Consent Banners Without Breaking Analytics, Tracking, or AccessibilityA practical guide to test cookie consent banners across UX, analytics tracking verification, consent mode testing, and accessibility, with browser checks, automation ideas, and edge cases.
Jun 11, 2026 · Markus GasserHow to Test AI Coding Assistant Changes Before They Quietly Break Your FrontendA practical workflow for testing AI coding assistant changes, catching AI-generated UI changes, preventing frontend regression testing gaps, and spotting markup drift before merge.
Jun 10, 2026 · Markus GasserHow to Cut Flaky Test Triage Time Before It Slows Down ReleasesLearn how to reduce flaky test triage time, lower CI failure triage overhead, and keep releases moving with practical maintenance, debugging, and governance tactics.
Jun 10, 2026 · Markus GasserWhy Browser Tests Fail in Preview Deployments Even When Staging Looks FineA debugging guide to browser tests failing in preview deployments, covering ephemeral deployment testing, environment drift, flaky selectors, auth issues, and practical fixes.
Jun 9, 2026 · Markus GasserHow to Test Web App Print Styles Before Customers Discover Broken Invoices and ReportsA practical guide to test print styles in web apps, catch print CSS testing issues, and prevent browser print preview bugs in invoices, reports, and admin pages.
Jun 8, 2026 · Markus GasserHow to Test Keyboard Navigation in Complex Web Apps Without Missing Real Accessibility BugsA practical guide to test keyboard navigation in web apps, with focus order testing, keyboard accessibility pitfalls, modal traps, menu behavior, and accessibility regression checks.
Jun 4, 2026 · Markus GasserHow to Reduce CI Noise When Flaky Tests Hide Real Release RisksLearn how to reduce CI noise from flaky tests, improve flaky test triage, and keep pipeline signal strong enough to protect release confidence.
Jun 3, 2026 · Markus GasserWhy GitHub Actions Browser Tests Fail Only on Pull Requests, Not Main BranchDebug why browser tests fail on pull requests in GitHub Actions but pass on main, including cache differences, permissions, env vars, parallelism, and CI drift.
Jun 3, 2026 · Markus GasserHow to Test AI-Generated UI Changes Before They Break Your Frontend Regression SuiteA practical workflow for QA engineers and frontend teams to test AI-generated UI changes, catch regressions early, and keep frontend regression testing stable.
Jun 2, 2026 · Markus GasserWhat Is Exploratory Testing?Learn what exploratory testing is, how it differs from scripted testing, how test charters and session-based testing work, and how teams document findings without making QA rigid.
Jun 2, 2026 · Markus GasserPlaywright Test Data Cleanup Patterns That Keep CI Runs RepeatableLearn practical Playwright test data cleanup patterns for seeded test data, isolation, and teardown so CI runs stay repeatable and browser tests stop failing from leftover state.
Jun 1, 2026 · Markus GasserWhy Frontend Teams Keep Missing Accessibility Regressions in ReviewA practical opinion piece on why frontend accessibility regressions slip through code review, and the testing habits that catch them earlier with semantic HTML, keyboard navigation, and visual review.
Jun 1, 2026 · Markus GasserHow to Add Quality Gates to CI/CD Without Slowing Down ReleasesLearn how to design quality gates in CI/CD with smoke tests, targeted regression, and lightweight approvals so releases stay fast without losing confidence.
May 29, 2026 · Markus GasserHow to Test Feature Flags in Production Without Accidentally Testing the Wrong AudienceA practical guide to test feature flags in production safely, with workflows for audience targeting QA, rollout testing, kill switches, and timing pitfalls.
May 28, 2026 · Markus GasserHow to Debug Hydration Mismatch Bugs Before They Turn Into False Frontend FailuresA practical guide to debug hydration mismatch bugs, separate real frontend defects from test noise, and use logs, screenshots, and rendering clues to find the root cause.
May 26, 2026 · Markus GasserPlaywright Flaky Test Debugging Checklist: 15 Things to Check Before You Blame the AppA practical Playwright flaky test debugging checklist for selectors, waits, locators, network mocking, CI variance, and test data isolation before you blame the app.
May 25, 2026 · Markus GasserHow to Test Feature Flags Without Turning Every Release Into a Guessing GameA practical feature flag testing workflow for validating enabled, disabled, and partial-rollout states with QA, SDET, and release team-friendly tactics.
May 23, 2026 · Markus GasserHow to Keep Test Automation Maintainable When Your Product Changes Every SprintA practical analysis of test automation maintainability sprint changes, stable locators, test refactoring, and how to keep your regression suite healthy without rewriting everything.
May 20, 2026 · Markus GasserHow Much Test Automation Is EnoughLearn how to decide what to automate, what to keep manual, and how to balance test automation coverage, regression risk, and maintenance cost.
May 19, 2026 · Markus GasserHow to Avoid Brittle Automated TestsLearn how to avoid brittle automated tests with better locators, waits, test data, isolation, and maintenance habits that reduce flaky tests and CI noise.
May 18, 2026 · Markus GasserHow to Reduce Test Maintenance CostsA practical guide for QA managers, SDETs, and CTOs on reducing test maintenance costs, lowering QA automation cost, and building less flaky test suites.
